C++ Quickstart

There are two layers of objects in the call sequence; tell them apart first:

IRTCEngine—process-level; one is enough. It creates channels, enumerates devices, and handles IM and log upload
IRTCChannel—one object per channel. User queries, tracks, publishing and subscribing, and local recording are all on it

Initialize the SDK

SRTC::RTCEngineOptions opt;
opt.enable_log = 1;              // 0 (or not passing opt at all) disables SDK logging entirely
opt.log_path   = "D:/log/";      // If empty, uses "Documents/<app name>/logs/"

SRTC::IRTCEngine* _irtc = nullptr;
SRTC::StatusCode ret = SRTC::RTCEngine_Init(&_irtc, &opt);
if ((ret != SRTC::StatusCode::OK) || !_irtc)
{
    return false;
}

The log switch and log directory can only be set here; see RTCEngineOptions.

Set the engine-level event handler

_irtc->setEventHandler(this);

This handler only receives callbacks that don’t belong to any channel: device changes, network probing, and IM. For details, see IRTCEngineEvent. Channel-level callbacks are covered in the next step.

Join a channel

This takes two steps: createChannel only creates the object and doesn’t join; call join() after you’ve configured it. The reason for two steps: onJoinChannel is called back before join() returns, so if you set the handler too late, you miss it.

std::string token = "";
SRTC::IRTCChannel* _ch = nullptr;
SRTC::StatusCode ret = _irtc->createChannel(token.c_str(), &_ch);
if ((ret != SRTC::StatusCode::OK) || !_ch)
{
    return ret;                  // On failure, _ch is always nullptr
}

// 1) Configuration. stream_model / simple / mcu_track / enable_audio_record
//    are read during join(), so they must be set here
SRTC::IRTCChannelSetting* set = nullptr;
_ch->getSetting(&set);
set->set_stream_model(1);

// 2) Channel-level callbacks; must be set before join()
_ch->setEventHandler(this);

// 3) Actually join. This is synchronous; onJoinChannel has already been called back before it returns
ret = _ch->join();
if (ret != SRTC::StatusCode::OK)
{
    _irtc->leaveChannel(_ch->getChannelId());   // A failed channel object must also be reclaimed
    _ch = nullptr;
    return ret;
}

For more settings, see IRTCChannelSetting; for channel-level callbacks, see IRTCChannelEvent.

Turn the camera on and off

    SRTC::IRTCLocalCameraTrack* _camStream = nullptr;
    const char* trackKey = "camera";
    SRTC::StatusCode ret = _ch->getCameraTrack(trackKey, &_camStream);
    if ((ret != SRTC::StatusCode::OK) || !_camStream)
    {
        return ret;
    }
    _camStream->addPlayView(callbackView);
    _camStream->startCapture();

    SRTC::RTCVideoPublishOptions* opt = nullptr;   // nullptr means use the default publishing parameters
    _ch->publish(_camStream, opt);

    SRTC::IRTCLocalCameraTrack* _camStream = nullptr;
    const char* trackKey = "camera";
    SRTC::StatusCode ret = _ch->getCameraTrack(trackKey, &_camStream);
    if ((ret != SRTC::StatusCode::OK) || !_camStream)
    {
        return ret;
    }

    _camStream->stopCapture();
    _camStream->removeAllPlayView();
    _ch->unpublish(_camStream);

The two publish overloads have no default argument, so you must pass opt explicitly. And you can’t write publish(tk, nullptr) directly— the video and audio overloads would be ambiguous. Use a typed null pointer variable as shown above.

For more local camera methods, see IRTCLocalCameraTrack.

Turn the microphone on and off

    SRTC::IRTCLocalMicTrack* _micStream = nullptr;
    const char* trackKey = "mic";
    SRTC::StatusCode ret = _ch->getAudioTrack(trackKey, &_micStream);
    if ((ret != SRTC::StatusCode::OK) || !_micStream)
    {
        return ret;
    }
    _micStream->startCapture();

    SRTC::RTCAudioPublishOptions* opt = nullptr;
    _ch->publish(_micStream, opt);

    SRTC::IRTCLocalMicTrack* _micStream = nullptr;
    const char* trackKey = "mic";
    SRTC::StatusCode ret = _ch->getAudioTrack(trackKey, &_micStream);
    if ((ret != SRTC::StatusCode::OK) || !_micStream)
    {
        return ret;
    }

    _micStream->stopCapture();
    _ch->unpublish(_micStream);

For more local microphone methods, see IRTCLocalMicTrack.

    SRTC::IRTCLocalScreenTrack* _screenStream = nullptr;
    const char* trackKey = "screen";
    SRTC::StatusCode ret = _ch->getScreenTrack(trackKey, &_screenStream);
    if ((ret != SRTC::StatusCode::OK) || !_screenStream)
    {
        return ret;
    }
    _screenStream->startCapture();

    SRTC::RTCVideoPublishOptions* opt = nullptr;
    _ch->publish(_screenStream, opt);

    SRTC::IRTCLocalScreenTrack* _screenStream = nullptr;
    const char* trackKey = "screen";
    SRTC::StatusCode ret = _ch->getScreenTrack(trackKey, &_screenStream);
    if ((ret != SRTC::StatusCode::OK) || !_screenStream)
    {
        return ret;
    }

    _screenStream->stopCapture();
    _ch->unpublish(_screenStream);

For more local screen sharing methods, see IRTCLocalScreenTrack.

Turn the speaker on and off

    SRTC::IRTCRemoteAudioTrack* _speakerStream = nullptr;
    SRTC::StatusCode ret = _ch->getRemoteAudioTrack("", "", &_speakerStream);
    if ((ret != SRTC::StatusCode::OK) || !_speakerStream)
    {
        return ret;
    }
    _speakerStream->startPlay(nullptr);

    SRTC::IRTCRemoteAudioTrack* _speakerStream = nullptr;
    SRTC::StatusCode ret = _ch->getRemoteAudioTrack("", "", &_speakerStream);
    if ((ret != SRTC::StatusCode::OK) || !_speakerStream)
    {
        return ret;
    }

    _speakerStream->stopPlay();

For more speaker methods, see IRTCRemoteAudioTrack.

Show and hide remote video

    SRTC::IRTCRemoteVideoTrack* _remoteStream = nullptr;
    std::string uid = "";              // The user's uid
    std::string stream_track_id = "";  // Track ID from the user's stream_tracks
    SRTC::StatusCode ret = _ch->getRemoteVideoTrack(uid.c_str(), stream_track_id.c_str(), &_remoteStream);
    if ((ret != SRTC::StatusCode::OK) || !_remoteStream)
    {
        return ret;
    }

    SRTC::RTCHwndView view(hwnd);      // Or implement IRTCView yourself
    _remoteStream->addPlayView(&view);
    _ch->subscribe(_remoteStream);

    SRTC::IRTCRemoteVideoTrack* _remoteStream = nullptr;
    std::string uid = "";              // The user's uid
    std::string stream_track_id = "";  // Track ID from the user's stream_tracks
    SRTC::StatusCode ret = _ch->getRemoteVideoTrack(uid.c_str(), stream_track_id.c_str(), &_remoteStream);
    if ((ret != SRTC::StatusCode::OK) || !_remoteStream)
    {
        return ret;
    }

    _remoteStream->removeAllPlayView();
    _ch->unsubscribe(_remoteStream);

addPlayView takes an IRTCView*. For window rendering, you can use the ready-made SRTC::RTCHwndView from the header directly; make sure its lifetime extends past removeAllPlayView.

Start and stop local recording

    SRTC::IRTCRecord* _rc = nullptr;
    SRTC::StatusCode ret = _ch->getLocalRecord("", &_rc);
    if ((ret != SRTC::StatusCode::OK) || !_rc)
    {
        return ret;      // Returns an error if you haven't joined the channel or the current media streaming mode doesn't support recording
    }
    // Record the specified window
    HWND hwnd = (HWND)this->winID();
    _rc->setRecordHwnd(hwnd, 0, 0, 0, 0);
    // Recording layout configuration
    //_rc->setRecordLayoutMemberView(dt.c_str(), dt.size());
    _rc->startRecord();

    SRTC::IRTCRecord* _rc = nullptr;
    _ch->getLocalRecord("", &_rc);
    _rc->stopRecord();

Each channel has only one recording object. The mid parameter is kept only for interface compatibility; pass an empty string. For more local recording methods, see IRTCRecord.

Leave the channel

_irtc->leaveChannel(_ch->getChannelId());
_ch = nullptr;      // The object has been destroyed; you must set the pointer to null yourself

IRTCChannel itself has no leave(). To leave all channels at once, use _irtc->leaveAllChannel(); after that, every IRTCChannel* becomes invalid.

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Server API

Initialize the SDK

Set the engine-level event handler

Join a channel

Turn the camera on and off

Turn the microphone on and off

Turn the speaker on and off

Show and hide remote video

Start and stop local recording

Leave the channel

​Initialize the SDK

​Set the engine-level event handler

​Join a channel

​Turn the camera on and off

​Turn the microphone on and off

​Start and stop screen sharing

​Turn the speaker on and off

​Show and hide remote video

​Start and stop local recording

​Leave the channel

Initialize the SDK

Set the engine-level event handler

Join a channel

Turn the camera on and off

Turn the microphone on and off

Start and stop screen sharing

Turn the speaker on and off

Show and hide remote video

Start and stop local recording

Leave the channel